Part of tread portion of an automobile tire



FIG. 1 is a perspective view of part of tread portion of an automobiletire showing my new design, it being understood that the tread patternrepeats uniformly throughout the circumference of the tire;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an enlarged fragmentary front elevational view thereof; and,

FIG. 4 is an enlarged cross-sectional view thereof taken along line 4—4in FIG. 3.

The portion of the article shown in broken lines is for illustrativepurpose only and forms no part of the claimed design.

The ornamental design for a part of tread portion of an automobile tire,as shown and described.